Contemplating on what to do pertaining to abortion or not

A man and I are currently expecting a child . We’ve been together for almost a year but when we were fighting he got involved with a girl and after two months she ended up pregnant and moved out to ca. He tells me the he loves the both of us and she knows me and has threatened me and knows that I’ve been with him but everything is very complicated. He is okay with me keeping it and he will support me but I’m not sure . I don’t like the situation and I feel like it’s a bad look.but at the same time I still chose to deal with him and make excuses for him because he would tell me he told her not to keep it and he was stressed about the situation but he’s the type of person to handle his business no matter what. Having a child is supposed to be a beautiful thing and it’s been stressful on me because when I had my second child I wanted to have a family dynamic and I didn’t want drama or craziness . Idk what to do I’ve made several appts to get an abortion but I j can’t go through with it logically I want to do it but I’m my heart it’s hard for me to do. I really need some helpful advice this whole situation had cause me not to eat and I’ve been really down about it ... please don’t beat me down because Ik it makes me a bad person to be in this situation